package com.ruoyi.web.controller.common;

import com.google.code.kaptcha.Producer;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.core.redis.RedisCache;
import com.ruoyi.common.utils.sign.Base64;
import com.ruoyi.common.utils.uuid.IdUtils;
import com.ruoyi.system.service.ISysConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

@RestController
public class CpatchaController {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private RedisCache redisCache;

    @Autowired
    private ISysConfigService configService;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public AjaxResult getCode(HttpServletResponse response) throws IOException{
        AjaxResult ajaxResult=AjaxResult.success();
        boolean captchaOnOff= configService.selectCaptchaOnOff();
        ajaxResult.put("captchaOff",captchaOnOff);
        if (!captchaOnOff){
            return ajaxResult;
        }

        //保存验证码信息
        String uuid= IdUtils.simpleUUID();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;

        String capStr=null,code=null;
        BufferedImage image=null;

        //生成验证码
        String captchaType= RuoYiConfig.getCaptchaType();
        if ("math".equals(captchaType)){
            String capText=captchaProducerMath.createText();
            capStr=capText.substring(0,capText.lastIndexOf("@"));
            code=capText.substring(capText.lastIndexOf("@")+1);
            image=captchaProducer.createImage(capStr);
        }else if ("char".equals(captchaType)){
            capStr=code=captchaProducer.createText();
            image=captchaProducer.createImage(capStr);
        }

        redisCache.setCacheObject(verifyKey,code,Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        //转换流信息写出
        FastByteArrayOutputStream os=new FastByteArrayOutputStream();
        try {
            ImageIO.write(image,"jpg",os);
        }catch (IOException e){
            return AjaxResult.error(e.getMessage());
        }
        ajaxResult.put("uuid",uuid);
        ajaxResult.put("img", Base64.encode(os.toByteArray()));
        return ajaxResult;
    }
}
